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RE: The problem with a passive transformer volume control

75.168.108.86

In Reply to: RE: The problem with a passive transformer volume control posted by Tre' on January 26, 2025 at 09:40:41

In that case its likely the issues I mentioned were addressed.

You used a square wave for measurement?

Follow Ups:

You're right - Tre' 16:13:34 01/27/25 (1)
I was testing it wrong. It does ring.

Time to re-think. Thanks.

Tre'

Have Fun and Enjoy the Music
"Still Working the Problem"
- I think you want as low an output impedance as you can get - Ralph 08:58:26 01/28/25 (0)
  The problem driving single-ended cable is a lack of standards. So the sound of cables is all over the map and the sound changes from one system to another.
  
  You can minimize that with a low output impedance which in turn is driving a low input impedance at the amp.
  
  That means either a large coupling cap, which IMO is inelegant, an output transformer or direct-coupling. Now you know why we did a direct-coupled output in our preamps.
  
  David Berning made a single-ended preamp with a direct-coupled output decades ago called the TF10. If you can find one used it might make a nice platform to work with.
  
  Plan B: put the volume controls inside your amp(s) and remote control them. That eliminates a good number of the problems with passive volume controls.

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